Jump to content
SAU Community

Recommended Posts

Better, e85 is cheap torque gains also, which are even harder to come by. On it's own the best mod you can do on a turbo car, if you can live with less K's to a tank, and have a pump locally.

The GCG is a bit of a mismatch turbo, mainly due to being stuffed into the stock housings. Best bet is to pick up a proper Garrett GT3076 and sell the GCG off, but then you need a new dump, intake, lines, external gate perhaps... the list can go on forever. Do some research before you jump in, as jumping up in power again from there may force you to replace all those parts again.

  • 1 month later...

Should i be a bit worried about using Caltex E85 when it was tuned on United E85?

It did have about 8 dollars worth of 98 in the tank when i filled it up with E85 before the tune though.

I run eflex occasionally on long runs, I didn't notice anything out of the ordinary. I think it's only around 4% richer than United I worked out. Still more accurate than a carby. ;)

It also means the mixture will be rich as a result of increased petrol content, which will compensate for lower octane.

When has richness ever compensated for lower octane? I know what you are saying in terms of it being a tad safer because its richer but that statement itself is wrong...

When has richness ever compensated for lower octane? I know what you are saying in terms of it being a tad safer because its richer but that statement itself is wrong...

This topic has been brought up many times, discussed thoroughly, and concluded by enough people who know SIGNIFICANTLY more than I do on the subject that it will make sweet f**k all difference when it comes to any risks brought on from ethanol content change and subsequent RON change.

Just wondering what spark plugs heat range you guys are running?

I have my S14 SR running on E85 making 280rwkw on E85 and are playing around with plug choice.

some say run a cooler heat range some say run the standard 6 heat range?

I have tried going from 6 to 7 and even colder plug in 8's.

What are the yays and nays of these different temp range? Apart from the starting up difficulty with the colder plug what else is to be considered?

This topic has been brought up many times, discussed thoroughly, and concluded by enough people who know SIGNIFICANTLY more than I do on the subject that it will make sweet f**k all difference when it comes to any risks brought on from ethanol content change and subsequent RON change.

Yep, here's a paper that backs up what you're saying.

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CDUQFjAA&url=http%3A%2F%2Fdspace.mit.edu%2Fbitstream%2Fhandle%2F1721.1%2F69496%2F775670245.pdf%3F..&ei=am8vUaHdBYj88QT6xYGQDQ&usg=AFQjCNGwXDKnWr9zhWOVwjfkHqrqsQZSyA&sig2=PlJh-ScUjRaOaCrwqunmpg&bvm=bv.43148975,d.eWU

Basically once you get above 40% ethanol content on a port-injected engine the detonation resistance of the fuel plateaus. So at minimum E40 "should" get you the same benefit as true E85.

Disclaimer: not an expert, read the full paper and decide for yourself :P

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • I'm an idiot, my intercooler is rated for 1000hp. I had clicked on the wrong product. Knowing the delta P would be nice, but I'm doubtful I'll do it. Now as for an EMAP, that would be great and I'll get around to it eventually but from my findings in my last post, I'm considering a turbo swap now. 
    • You sir, big win tonight. Precision never supplied compressor maps in the past and Idk when they started, but it seems they only offer for a few of the older gen2's which is exactly what I have. I punched in some numbers and seem to have gone with the wrong turbo. 600-700whp isn't in the most efficient area and is close to the choke line. 800whp is well off the map. Punching the numbers into a 68mm gen2 turbo map is bang on in the center. Here I was thinking going smaller would shift the power band down, but in reality it would just make it so much worst due to my rev limit. I would have never thought. 
    • Increasing overlap will bring the torque down earlier (and make your idle sound sick lol). Worth a shot (if you dyno time) to experience a bit (providing you are confident your valves won't kiss your pistons). Is to just take off 5 degrees across the boosted area of the map, and then retard the exhaust cam let's say, 3 degrees at a time and then overlay all the runs with VCT on all the way and VCT off as soon as you make positive pressure. Ideally you would have a total of 6x overlays to looks at 0 exhaust & VCT off once manifold pressure is +ve 0 exhaust & VCT on all the way -5 exhaust & VCT off once manifold pressure is +ve -5 exhaust & VCT on all the way -10 exhaust & VCT off once manifold pressure is +ve -10 exhaust & VCT on all the way Just leave your O2 wideband closed loop on for all of the boost area & RPM, and hopefully there isn't too much fuel correction needed and the Haltech is fast enough to compensate (I do this, then apply the correction to the main table). Getting that overlay data should give you a good indication of what to aim for.
    • So, my main limitation here is that the car does not have an oil pressure sensor by default, just a switch. As part of my tune I bought an oil pressure sensor upgrade so I now have access to oil pressure levels and logging rather than just the boolean behaviour of the switch but this means I need to use the tuning app to display this value. So, this rules out using any other app on the iPad. The app will also flash when pressure drops which is a nice feature. I have replaced the centre screen with an Android one, which is awesome for Android Auto, but I think it might be too far away and out of my line of sight. I might add some gauges to it this weekend and just see. I guess if its just temp and oil pressure I can make them massive! 🤣  
    • This is what the look like normally. Except we only got the 2 doors locally
×
×
  • Create New...